Maybe not the S8, would prefer last year phones, the S7 or the note 7 if sold refurbished. The S8 improves mainly in the display, otherwise, better speaker than the miserable S7 and better headphone to the S7 and slightly better camera results.
I still prefer a front facing fingerprint sensor, and a flatter screen because I want to use a tempered glass on it and I won't be disappointed if android O won't come to the S8 until next year.
Something I really like about the S8 and wish apple to do the same. The onscreen home button is always on and I do wish apple have a smaller bezel phone, with Touch ID under the screen and always on home button with a 3D Touch on each edge, which could be active even when the phone is locked or in any other app. iOS already use the left edge to 3D Touch to the last app, so why not make a right edge 3D Touch to camera in any app and when locked, the top edge should on and off the flashlight.
Of course on the hardware side, iPhones should get QHD amoled but running at 1080p unless it's running videos and photos, DEX is a brilliant idea and Samsung seems to do a good job at it on the software side, hardware wise could be better if it comes in a portable keyboard dock using the phone screen as a touchpad. Camera software should also allow for RAW in the native app and easier settings and since apple has been using multi frame on the iPhone 7, it may also improve further to get close to the pixel photos.